Stimulating and balancing. Thyme Sweet essential oil has a more gentle action than Thyme White, which makes it preferable for use with children and the elderly. OF the many varieties of Thyme, this is usually found growing at high altitudes. It is a highly effective neurotonic, which means it gives a boost to the body’s nervous system, while it also has a pronounced impact on immune system after, for example, a course of powerful antibiotics, when your body’s natural defences are at their lowest.  Sweet Thyme can also have a normalizing effect on obsessive emotions, helping to bring a sense of balance.